[RndTbl] Noisy fan

Alberto Abrao alberto at abrao.net
Tue Feb 2 21:36:02 CST 2021

On 2021-02-02 8:56 p.m., Adam Thompson wrote:
> Oh, also, re: 3-pin vs. 4-pin, interesting page that says "don't worry 
> about it" (unless you want speed control): 
> https://landing.coolermaster.com/faq/how-to-connect-a-3-pin-or-4-pin-fan-to-the-motherboard/ 
> <https://landing.coolermaster.com/faq/how-to-connect-a-3-pin-or-4-pin-fan-to-the-motherboard/>
It is fine to leave the 4th pin flying. Most 4-pin fan connectors allow 
for that, with the notches being tuned for 3-pin connection as the 4th 
one may or may not be present.
> On 2021-02-01 19:23, Adam Thompson wrote:
>> IIRC, the fan depends on the CPU, the motherboard socket, and the 
>> case dimensions/clearance.  I've found a vague reference to this fan 
>> being used on an AM3 socket, does that describe your situation?  If 
>> so, the forum poster I found replaced his AVC fan with a "Be Quiet!" 
>> brand "Shadow Rock TF2" (https://www.bequiet.com/en/cpucooler/1074 
>> <https://www.bequiet.com/en/cpucooler/1074>) which may or may not fit 
>> your case.  (And holy cow is it ever expensive!)
The main thing is to keep around the same voltage and amp ratings. It 
does not need to be exact, but close enough will work.

For CPU fans, the fan used is often dependent on the heatsink design. 
OEMs also take into account other things, such as overall heat on the 
case and amount of auxiliary fans. They tend to use more powerful fans 
should it needs to spin faster not only to cool the CPU, but other 
components as well. Lenovo/HP/Dell usually have CPU fans on the 0.5-0.7A 
range, while aftermarket coolers often go with less, opting to focus on 
the heatsink performance in order to keep noise at bay - but not taking 
into account that they may be needed to cool the other components, as it 
is often seen with OEM designs.

As an example, your standard Intel Core i5 CPU can be cooled with a 
paltry 0.07A fan when using a CPU cooler from Arctic. They focus on 
noise management as well as cooling performance. Again, the key to 
achieve that is the heatsink.

Another one: AMD FX-8150, known worldwide as a furnace. OEM cooler from 
AMD/Cooler Master is L O U D. I am using an Arctic Freezer 7A to cool 
it: 0.07A fan, 2000rpm max, but larger and with a vertical heatsink that 
blows air to the back of the case. Paired with auxiliary fans and some 
tuning, it runs stable and cooler than it did when using the OEM jet engine.

None of that matters, though: he wants to replace the fan only, so we 
should try to match the current one as the heatsink will be the same, 
not to mention all other components that may rely on its reserve air 
capabilities in case of emergency.

Kevin, if you're still looking for the fan, I have one here that you can 
have and does the job.

12V, 0.65A, 70mm. 4-pin, but, as I said, it is fine to leave unplugged.

It's yours if you need. Feel free to text/call/e-mail me to arrange pickup.

Kind regards,

Alberto Abrao
204-202-1778 (Landline)
204-558-6886 (Mobile)
alberto at abrao.net

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